Planer-guard.



W. JENKINS.

PLANER GUARD.

APPLICATION FILED MAE. 7, 191a Patented Apr. 28, 1914.

2 SHBETS-SHEET 1.

INVENTOR. ii/2122mm J'n/G'ns COLUMBIA PLANOGRAPH co wAsmNuToN, n. C

W. JENKINS.

PLANER GUARD.

APPLIOATION FILED MAB. 7, 1913. 1,094,657. Patented Apr. 28, 1914.

2 SHEETS-SHEET 2.

WITNESSES INVENTOR.

lliam Jn/(ins.

CPLUMBIA PLANOGRAPH (20., WASHINGTON. D. C.

STATESPATENT OFEIQE.

VIILLIAIE JENKINS, 01E MEAFOBD, ONTARIO, CANADA.

PLANER-GUARD.

To all 10.7mm it may concern:

Be it known that I, Vl ILLIAM Jnxnixs, of the town of laleaford, in the county of Grey, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Planer-Guards, of which the following is the specification.

My invent-ion relates to improvements in planer guards, and the object of the invention is to devise a form of guard which will effectually protect the hands of the operator of the planing machine when passing the board over the planer table past the knives and which may be adjusted to any width of board, and it consists essentially of a plate, a telescopic frame supporting the plate, compression springs designed to hold the frame normally in its extended position, guide arms extending from each side of the plate and in proximity to each end thereof in an angular direction, a vertically journaled friction roller carried by the frame and designed to bear against the gage block or fence of the planer table, horizontal rollers carried by the end of the frame in prox imity to the gage block or fence a supporting arm pivotally connected to the planer table, a bracket depending from the outer end of the frame and to which the support ing arm is pivotally connected at one side of the center of the bracket, an arm pivoted to one side of the table carrying a block an arcshaped rod extending freely through the block and pivotally connected to the end of the supporting arm, a tension spring connected at one end to the rod in proximity to the supporting arm and at the other end to the block, and a clamping screw extending through the block against the rod as hereinafter more particularly explained by the following specification.

Figure 1, is a general perspective view of my device as applied to a planer. Fig. 2, is an enlarged plan view of my device. Fig. 3, is a cross sectional view on line mg Fig. 2. Fig. 4, is an enlarged perspective detail of the main portion of the guard. Fig. 5, is a cross sectional view on line cc-y' Fig. 2. Fig. 6, is a detail of one of the connecting brackets.

In the drawings like letters indicate corresponding parts in each figure.

Specification of Letters Patent.

Application filed March 7, 1913.

Patented Apr. 28, 1914:.

Serial No. 752,718.

A is a planer table of any suitable form provided with the usual planer shaft A on which are mounted the usual planer knives.

B is the gage block or fence of the planer table which is adjusted crosswise of the table in the usual manner, according to the width of board to be used.

C is the main plate of the planer guard provided with flanged sides C and an open top C across which extends the bars C forming a grid.

D is a bracket comprising a downwardly curved tip portion D, a vertical portion D and an inwardly extending portion D D are cylindrical plugs connected to the vertical portion of the bracket D by bolt D 1) is a. bracket located at the inner end of the plate C and provided with upwardly and outwardly inclined arms D and D forming guiding edges D against which the board is passed horizontally through the planer and guiding faces D against which the board is passed vertically through the planer. It will be noticed that the arm I) is a long arm and projects from that side of the guard beneath which the board is fed. The arm D is a comparatively shorter arm and merely acts to prevent any jar on the guard as the board passes beyond the same.

. E and E are telescopic bars. Each of the bars E and E comprise the tubular members E E and E The plugs D are threaded in to the outer end of the tubular member E and connected as before described by the bolts D to the bracket D.

E are annular collars secured within the opposite end of the tubular member E The members E are provided with outer collars E which engage with the collars E when the telescopic members are drawn out to their fullest extent. The members E and E are connected together similarly to the members E and E The bracket D is provided with a horizontal flange 1).

D is a bolt extending through the inner end of the tubular member E and connecting plate E the horizontal flange 1), and plate C together, being secured therein by the nuts D F is a compression spring located within the tubular members E E and 13* between the vertical portions of the bracket D and the plugs D*.

G is supplemental supporting plate connected to the inwardly extending flange D of the bracket D.

H is a bridge ttrame extending under and over the frame formed by the tubular members E and E and provided with lugs H extending to each side of the tubular memhers E and E. The bridge frame H extends upwardly at an angle at each side of the planer guard and has a plate H connected thereto designed to bear upon the upper surface of the board.

G is a bolt extending through the lower portion of the bridge frame, the plate G and the plate H connecting them together.

if, I and l are cross plates provided with lugs 1 The lugs I of the plates 1 and I extend to the inside of the side flange 1* of the next adjusting plate and are pivotally connected thereto by the screw bolts 1.

l is an upturned lip extending from the plate l' and forming a handle.

i an upturned plate forming a handle secured to the inner end of the plate C.

J is a lup' extending outwardly from the horizontal portion D of the bracket D.

J is an arm pivoted on the bolt J QX' tending through the lug J.

J is a projection extending downwardly from the portion l)- against one side of the arm J. J is a tension spring connected to the same side of the arm J and to the portion D of the bracket D at a. suitable point.

J is a roller journaled in the forks J of the arm J on the pin J J and J are rollers journaled in the arms D and D on the pins J.

l: is a plate having a down turned outer end K and a headed inner end K K is a. plate secured to the upper surface of the bridge bar H. and forming a slit through which the plate K slidably eXtends.

hi is a hook swung; in the beaded end of the plate K and designed to engage in one of the cross bars C of the grid extending acro s the open face of the main plate C.

L is a supporting arm pivoted at one end to the side of the planer table and intern'iediately of its length by the bolt L to the vertical portion D of the bracket D on that side of the center from which the board is delivered from the planer or in other words on that side o'l the planer from which the arm 1 7 extends from the planer guard. in this way it will be readily understood that the receiving; end of the guard or that side beneath which the hand of the workman is liable to p is held nori'nally by its own weight against the sin-face of the planer table thereby preventing any liability Lose -ea? workmans hand getting in contact with the knives when placing the board in position to enter beneath the guard.

L is a rod pivotally connected at its upper end to the free end, of the arm L.

M is a right angular bracket extending over the outer edge of the planer table in proximity to the outer end of the arm L. The inner edge of the upper arm of the bracket PM is beveled inwardly toward the board and toward that side away from the planer guard.

Ill. is a projection ext nding downwar lly from the bracket hit into a recess M in the planer table. 4%. set screw M extends through the bracket M the side of the planes forming with the projection M in the recess M? a support for the bracket. Pivotally connected to the bracket and. depending therefrom is a plat provided at its lower end with a block This block is provided with a vertical aperture through which the rod if freely extends. A. tension spring hi. SllltGlIUltlillfl the rod L is secured at its lower end to the block M and at its upper to a pin extending through. an opening in the rod l'i ries of openings M is provided. and by moving the pin M from one to another the tension of the spring M may be Varied. In some cases the operator may desire to run a board through the machine without any pressure thereon. in order to do this the planer guard carried by the arm It is forced up ardly and the set screw M locked against the rod if so as to hold the planer guard in a position above and tree of the board.

H ring now described the principal parts involved in my invention, 1 will briefly de scribe the operation of the same.

The board to be planed is placed on the table in the usual manner against the gage block 13 and passet beneath the upwardly inclined ends of the arms D and H The board is then forced longitudinally beneath such arms turning the planer guard up wardly on its pivot formed by the bolt L. The spring acting to counter balance the weight of the guard. The board is then passed through the planer in the usual manner and as it passes from the planer knives the butt end of the board ein ages the inclined guarding surface of the arm i and D of the arm D allowing the planer guard to gradually drop to its normal position without jar. It will also be understood that as the board is passed beneath the planer guard the roller J contacts with the gage block l3 rolling vertically up the same.

lVhen a narrower board is to be planed and it is desired to adjust the mage block B toward the outer end of the table this is ot' the l done in the usual manner, the hook iii. be

ing first removed from engagement with the cross bars C lhe operator then grips the handle I drawing the main plate longitudinally telescoping the tubular members E E and E against the compression of the springs F. The hook K may then he swung downwardly to engage another of the cross bars C If it is desired to trim the edge of the board, the board is passed over the planer in the position shown by dotted lines in Fig. 2, of the drawing and against the rollers J collapsing the planer guard more or less toward the position shown in dotted lines, according to the thickness of the board passed over the planer. When it is desired to give a slight bevel to the surface of the board, the gage block B is adjusted so as to hold the outer edge of the board on the beveled arm of the bracket M thereby canting the board slightly upwardly as it passes over the planer.

If for any purpose it is desired to remove the guard, all it is necessary to do is to loosen the set screw N and remove the bracket M. The arm L may then be swung on its pivot carrying the guard free of the table. It will also be noticed that in my construction of guard the open top of the guard plate C provides for the operator observing how much and when to adjust the cutting knives of the planer.

From this description it will be seen that I have devised a very simple form of planer guard which will insure of the hands of the operator being protected, no matter what board is being passed over the planer, and such a device as may be adjusted to various sizes and thicknesses of boards. It will also be seen that my guard will automatically adjust itself to various thicknesses of boards. Also should a board he too thick to enter between the fence and the outer end of the arm D, the frame may be looked back by the hook K hat I claim as my invention is- 1. A planer guard comprising an arm pivoted at one end to the planer table so as to swing in a vertical plane, a tension device connecting the opposite end of the arm to the table resiliently, an expansible and contractible frame carried at one end by the arm intermediately of its length and bearing at its opposite end against the gage block of the planer table, a gage plate secured at its inner end to the expansible frame, and means for locking the gage plate in the position to which it is adjusted, as and for the purpose specified.

2. 1k planer guard comprising an arm pivoted at one end to the planer table so as to swing in a vertical plane, a resilient device connecting the opposite end of the arm to the table, an expansible and contractible frame carried at one end by the arm intermediately of its length and hearing at its opposite end against the gage block of the planer table, a plate secured at its inn-er end to the expansible frame having an open top having a series of cross bars extending across the opening to form a grid, and a hook carried by a stationary portion of the frame and designed to engage with the cross bars and hold the frame in the position to which it is adjusted and means for guiding the board beneath the frame, as and for the purpose specified.

3. A. planer guard comprising an arm pivoted at one end to the planer table so as to swing in a vertical plane, a resilient device connecting the opposite end of the arm to the table, an expansible and contractible frame carried at one end by the arm intermediately at its length and hearing at its opposite end against the gage of the planer table, a plate secured at its inner end to the expansible frame having an open top having a series of cross bars extending across the opening to form a grid, means for guiding the board beneath the frame, a plate located over the guard plate and slidable longitudinally in the stationary portion of the frame, a stop at one end of the plate and a hook swingably connected at the opposite end of the plate and designed to engage with the bars of the grid opening, as and for the purpose specified.

4. A planer guard comprising a supporting arm pivoted at one end to the planer table to move in a vertical plane, resilient connecting means between the opposite end of the arm and the planer table, a frame carried by the supporting arm intermediately of its length and a guard plate carried thereby, means for guiding the board heneath the frame, an arm pivoted to the inner end of the frame vertically set roller journaled in the arm and bearing against the gage block of the planer table, a stop de pending from the frame to one side of the roller, and a tension spring normally holding the arm against such stop, and horizontal rollers journaled to each side of the first mentioned horizontal roller and designed to bear against the surface of the board when passed edgewise over the planer knives, as and for the purpose specified.

5. A planer guard comprising an arn pivoted at one end to the planer table so as to swing in a vertical plane, resilient means for connecting the opposite ends of the arm to the planer table, an expansihle and contractilole frame carried by the arm having a downward curved lip at its end, a main guard plate secured to the inner end of theframe, supplemental guard plates pivotally connected together in series and said series being connected to the main guard plate and designed to he supported by the curved iip when the frame is adjusted into its contracted position and means for guiding the board. beneath the guard, as and for the purpose specified.

6. A planer guard comprising an arm pivoted at one end to the planer table so as to swing in a vertical plane, resilient means for connecting the opposite end of the arm 10 to the table, an expansihie and contractibie mes es? frame supported by the arm, guide arms inclined inwardly from the inner end of the table and adpistabic means for resllientiy holding the frame partlaiiv contracted, as and for the purpose specified.

WILLIAIMI JENKINS.

Witnesses B. BOYD, M. EGAN.

{topics of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents. "Washington, D. G. 

